/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.dx.io.instructions;

import java.util.HashMap;

/**
 * Map from addresses to addresses, where addresses are all {@code int}s.
 */
public final class AddressMap {

	/** underlying map. TODO: This might be too inefficient. */
	private final HashMap<Integer, Integer> map;

	/**
	 * Constructs an instance.
	 */
	public AddressMap() {
		map = new HashMap<Integer, Integer>();
	}

	/**
	 * Gets the value address corresponding to the given key address. Returns
	 * {@code -1} if there is no mapping.
	 */
	public int get(int keyAddress) {
		Integer value = map.get(keyAddress);
		return (value == null) ? -1 : value;
	}

	/**
	 * Sets the value address associated with the given key address.
	 */
	public void put(int keyAddress, int valueAddress) {
		map.put(keyAddress, valueAddress);
	}
}
